Recharging bead incorporating fibres or at least one reinforcing wire

Abstract

The invention relates to a recharging or reloading bead incorporating discontinuous fibres or at least one reinforcing wire. This bead comprises a core reinforced by discontinuous fibres or at least one continuous wire (6) made from a non-fragile material, which melts or burns at a temperature equal to or above 500° C., e.g. a weldable alloy or metal, such as copper or stainless steel. It also comprises an outer sheath (9b) made from an organic substance. It can be produced by the co-extrusion or co-spinning of two pastes.

We claim: 
     
       1. A reloading cord for thermal deposition on a support, said cord having increased cord integrity which reduces the occurrence of cord breakage or end portion detachment, said cord comprising a core and an outer sheath of an organic material surrounding said core, said core including a mineral powder, reinforcing means and an organic binder, said reinforcing means comprising discontinuous, non-fragile, weldable alloy or metal fibres having a diameter of 50 to 200 μm and a melting temperature or a burning temperature at least equal to 500° C., whereby detachment of an end portion of the cord due to its own weight from the remainder of the cord is substantially avoided following elimination of the organic binder and the sheath over a length of 15 to 25 mm from an adjacent end of the cord. 
     
     
       2. A cord according to claim 1, wherein the fibres are made from stainless steel or copper. 
     
     
       3. Bead according to claim 1, wherein the fibres are 10 to 50 mm long. 
     
     
       4. A cord according to claim 3, wherein the diameter of the fibres is 50 to 200 μm. 
     
     
       5. A cord according to either of the claims 3 or 4, wherein the fibres represent 0.20 to 0.50% by weight of the cord. 
     
     
       6. A reloading cord for thermal deposition on a support, said cord having increased cord integrity which reduces the occurrence of cord breakage or end portion detachment, said cord comprising a cord and an outer sheath of an organic material surrounding said cord, said core including a mineral powder, reinforcing means and an organic binder, said reinforcing means comprising at least one continuous, non-fragile, weldable alloy or metal wire having a diameter of 50 to 200 μm and a melting temperature or a burning temperature at least equal to 500° C., whereby detachment of an end portion of the cord due to its own weight from the remainder of the cord is substantially avoided following elimination of the organic binder and the sheath over a length of 15 to 25 mm from an adjacent end of the cord. 
     
     
       7. A cord according to either of claims 1 or 6, wherein the mineral powder of the core is constituted by a metal alloy or metal powder and particles of at least one ceramic material. 
     
     
       8. A cord according to claim 7, wherein the mineral powder is formed by a nickel-chromium-boron-silicon alloy powder, tungsten carbide particles and glass fibres. 
     
     
       9. A cord according to claim 7, wherein the mineral powder is formed by a nickel-chromium-boron-silicon alloy powder and tungsten carbide particles. 
     
     
       10. A cord according to claim 6, wherein the core comprises 1 to 3 continuous reinforcing wires. 
     
     
       11. A cord according to claim 6, wherein said at least one wire is made from stainless steel or copper.